Method extend

src/tinyvec.rs:1353–1375

(&mut self, iter: T)

impl<A: Array> Extend<A::Item> for TinyVec<A> {
  #[inline]
  fn extend<T: IntoIterator<Item = A::Item>>(&mut self, iter: T) {
    let iter = iter.into_iter();
    let (lower_bound, _) = iter.size_hint();
    self.reserve(lower_bound);

    let a = match self {
      TinyVec::Heap(h) => return h.extend(iter),
      TinyVec::Inline(a) => a,
    };

    let mut iter = a.fill(iter);
    let maybe = iter.next();

    let surely = match maybe {
      Some(x) => x,
      None => return,
    };

    let mut v = a.drain_to_vec_and_reserve(a.len());
    v.push(surely);
    v.extend(iter);
    *self = TinyVec::Heap(v);
  }
}

impl<A: Array> From<ArrayVec<A>> for TinyVec<A> {